91041085 has 8 divisors (see below), whose sum is σ = 109353816. Its totient is φ = 72763200.

The previous prime is 91041073. The next prime is 91041089. The reversal of 91041085 is 58014019.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4439449 + 86601636 = 2107^2 + 9306^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 91041085 - 2¹⁵ = 91008317 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91041089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2566 + ... + 13735.

It is an arithmetic number, because the mean of its divisors is an integer number (13669227).

Almost surely, 2^91041085 is an apocalyptic number.

It is an amenable number.

91041085 is a deficient number, since it is larger than the sum of its proper divisors (18312731).

91041085 is a wasteful number, since it uses less digits than its factorization.

91041085 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17423.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 91041085 is about 9541.5452102896. The cubic root of 91041085 is about 449.8618258902.

The spelling of 91041085 in words is "ninety-one million, forty-one thousand, eighty-five".